<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="lib/vue.js"></script>
</head>
<body>
    <div id="root">
        <input v-model="str" type="text"/>
        <div>{{str}}</div>
    </div>

</body>
<script>
    new Vue({
        el:"#root",
        data:{
			str:"我现在过的很好！"
        }
    })
</script>
</html>